From climbing on the KnutH for quite sometime, I've found: it's that "knot-like" element under the wraps (pointed out in the photo, below) that makes the hitch succeed or fail. That lower portion of the KnutH has to be just right for the hitch to grab and release comfortably. I like it tight.
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FWIW, What follows is an over simplification - just some personal, general observations:
Wraps hold, 'tails' grab (
"Tails"; that's all the stuff below the wraps). You only need enough wraps to hold your weight. At 200 pounds on the HH2 & HHx, I can make 4 wraps work. Too, many wraps makes releasing the hitch too hard. The "tails" of a hitch control the tending and grabbing. "Tails" too long; the hitch tends great but doesn't grab. "Tails" too short; the hitch doesn't tend well and grabs too well.
Side note: For a VT the braids act like a combination of wraps & "tails". So, finding the right combination takes a little more 'tweaking'. Other hitches (Distel, Michoacan, KnutH, etc.) have a kind of simplistic knot between the wraps & "tails" that acts like a more complex combination of wraps & "tails" allowing more complex 'tweaking'.
-- just my 2¢